KNOWN ISSUE: Discovery tasks fail immediately with error ''An unknown exception was thrown''
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KNOWN ISSUE: Discovery tasks fail immediately with error ''An unknown exception was thrown''


Article ID: 177009


Updated On:


Altiris Network Discovery


When running a Network Discovery task, it fails immediately with the following details:


An unknown exception was thrown.
Show raw exception message
System.Runtime.InteropServices.SEHException: External component has thrown an exception. at Altiris.DiscoveryTasks.DiscoverTask.OnExecute(IServerTaskExecutionInstance instance) at Altiris.TaskManagement.ServerTasks.BaseServerTask.OnExecute(ITaskExecutionEngine engine, IServerTaskExecutionInstance instance, TaskInstanceRequest request) at Altiris.TaskManagement.ServerTasks.BaseServerTask.Execute(ITaskExecutionEngine engine, IBaseTaskExecutionInstance instance, TaskInstanceRequest request) at Altiris.TaskManagement.Common.Execution.Engine.TaskEngineExecutionThread.ExecuteTaskHandler()


This condition may occur if a repair has been run on "Altiris Pluggable Protocol Architecture" within the Symantec Installation Manager.

This is a known issue and has been submitted to development.


If the Symantec Management Platform has been installed to a path which is not the default (e.g. E:\Altiris) and a repair has been run on "Altiris Pluggable Protocol Architecture", follow these steps:
  1. Modify the following registry values to point to the proper installation path of the Pluggable Protocols:
    Example:  If Altiris has been installed to: "E:\Altiris", then these values should be:
         BinariesPath:  E:\Altiris\Pluggable Protocols Agent\bin
         ConfigPath:  E:\Altiris\Pluggable Protocols Agent\bin\Config
  2. Either reboot the Notification Server, or run "iisreset" and restart all the Altiris Server services

This issue has been addressed by development and will be resolved in Pluggable Protocol Architecture SP4.

Applies To

  • Network Discovery SP2 7.0.844
  • Pluggable Protocol Architecture SP2 7.0.6455